Universal joint dust cover

Abstract

The utility model provides a universal joint dust cover which comprises a dust cover body, one end of the dust cover body is provided with a first opening end, the other end of the dust cover body is provided with a second opening end, and the first opening end is smaller than the second opening end. A limiting block is fixedly arranged in the second opening end, and the limiting block is matched with a male part of the universal joint in an abutting and limiting mode; the limiting block is fixedly connected with the dust cover body through the reinforcing ribs, and the end, close to the shell, of the limiting block is provided with a limiting inclined face. The limiting block is in abutting buffering limiting fit with the three-fork shaft of the universal joint male piece through the limiting inclined face. A circumferential shoulder part is arranged in the dust cover main body and is in abutting limiting fit with the roller of the male part. Due to the arrangement of the limiting block, the roller is prevented from directly colliding with the circumferential shoulder part with large impact force, and the service life of the dust cover body is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of universal joint dust cover, specifically relates to a universal joint dust cover. BACKGROUND

[0002] The universal joint is a machine part for realizing variable-angle power transmission, the constant-velocity universal joint comprises a female part at the end of an input shaft and a male part at the end of an output shaft, the female part at the end of the input shaft comprises a shell, the male part at the end of the output shaft comprises a rolling bearing, the rolling bearing comprises a three-pronged shaft and a roller, and the rolling bearing is adapted to be inserted into the shell through the open end of the shell of the female part. Power is transmitted from an engine or a motor to a gear transmission box, transmitted to the input shaft and the female part through the gear transmission box, and transmitted to the male part from the female part, and the female part and the male part rotate at a constant speed. The male part can also axially slide and angularly move in the female part, and the rolling bearing of the male part rolls when the male part slides relative to the female part.

[0003] In order to increase the service life of the universal joint, a dust cover is usually installed to reduce the influence of the external environment, and the universal joint dust cover seals the lubricating grease in the universal joint, so that the grease will not leak during use. After the dust cover is sleeved on the driving shaft universal joint connector, one open end of the dust cover is sleeved on the output shaft, and the other open end is sleeved on the open end of the female part shell. However, in order to prevent the male part of the universal joint from being pulled out of the shell of the female part, the existing dust cover usually directly limits the male part of the universal joint, which generates a large impact force and easily damages the dust cover.

[0004] The patent with the publication number CN208651470U discloses a dust cover and a driving shaft assembly using the same, which is provided with a dust cover, an abutting wall, a wave trough, a universal joint body, a universal joint shell, a connecting part, a universal joint shaft rod, a driving shaft and the like. The diameter of the wave trough connected with the outer wall is smaller than the diameter of the universal joint body, so that the wave trough has a limiting effect, preventing the universal joint body and the shaft rod from being pulled out of the universal joint shell, further preventing the pulled-out universal joint body and the shaft rod from damaging the dust cover, and preventing the lubricating oil from leaking.

[0005] However, the above-mentioned scheme limits the universal joint body through the wave trough, and the two are directly limited by collision, which generates a large impact force on the wave trough itself, reduces the service life of the dust cover, and has poor practicability. UTILITY MODEL CONTENTS

[0006] To solve the problems in the background art, the utility model provides a universal joint dust cover.

[0007] In order to achieve the above-mentioned purpose, the utility model provides the technical scheme as follows:

[0008] The utility model provides a universal joint dust cover, including dust cover main part, the first opening end is seted up in one end of dust cover main part, the second opening end is seted up in the other end, and the first opening end is smaller than the second opening end, the second opening end is fixedly provided with the limiting block, and the limiting block is located with the male piece of universal joint and abuts the limiting cooperation, the limiting block is fixedly connected with dust cover main part through the reinforcing rib, and the end part of limiting block close to the shell is equipped with the limiting inclined plane, and the limiting block is located with the three pronged shaft of male piece of universal joint and abuts the buffer limiting cooperation, and the dust cover main part is equipped with the circumferential shoulder part, and the circumferential shoulder part is located with the roller of male piece and abuts the limiting cooperation.

[0009] Further, the three ends of the three-pronged shaft are each provided with an arc end that slidingly engages the limiting inclined surface of the limiting block, and the three ends of the three-pronged shaft are each connected to a roller.

[0010] Further, the inner wall of the second opening end of the dust cover main body is fixedly provided with three protrusions that are spaced apart, the protrusions divide the second opening end into three recesses that are spaced apart, the limiting blocks are equal in number to the recesses and correspond one-to-one, and each limiting block is located in a corresponding recess; the recesses correspond one-to-one to the three rollers on the three-pronged shaft, and each roller slidingly engages a corresponding recess.

[0011] The present application has the following beneficial effects:

[0012] With the circumferential shoulder part, the roller can be directly limited, and the roller is prevented from separating from the shell. Meanwhile, with the limiting block, the resistance that the roller receives during sliding towards the outside of the shell becomes greater and greater, and the three-pronged shaft and the limiting block become more and more tightly engaged, thereby playing a buffering role, pre-releasing the locking force or friction force, and preventing the roller from directly colliding with the circumferential shoulder part with a large impact force, thereby ensuring the service life of the dust cover body. BRIEF DESCRIPTION OF DRAWINGS

[0013] The above and other objects, features and advantages of the exemplary embodiments of the present application will be more apparent from the following detailed description read in conjunction with the accompanying drawings, in which several embodiments of the present application are shown by way of example, and wherein like reference numerals refer to like elements throughout. In the drawings:

[0014] Figure 1 is a three-dimensional structure schematic diagram of the utility model;

[0015] Figure 2 is a shell and dust cover main part section split drawing of the utility model;

[0016] Figure 3 is a dust cover main part structure schematic diagram of the utility model;

[0017] Figure 4It is the position relation structure schematic diagram of the limiting block of the utility model;

[0018] Figure 5 It is the structure schematic diagram of the public piece of the universal joint of the utility model.

[0019] Mark explanation:

[0020] 1, shell; 11, input shaft; 2, dust cover main body; 21, corrugated cylinder; 22, first open end; 23, second open end; 3, limiting block; 31, reinforcing rib; 32, shoulder part; 4, convex part; 5, concave part; 7, three-pronged shaft; 71, cambered end; 8, roller. Specific implementation

[0021] The technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model, and those skilled in the art should know that the embodiments described below are part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0022] As Figures 1-5 Indicated, the technical scheme adopted by the utility model is as follows: a dust cover for universal joint, the universal joint includes a female piece at the end of the input shaft 11 and a male piece at the end of the output shaft (not shown in the drawing). The female piece includes a shell 1, which can be a three-column groove shell, and the male piece includes a rolling bearing, which includes a three-pronged shaft 7 and a roller 8, which is inserted into the shell 1 through the open end of the shell 1 of the female piece. The input shaft 11 drives the female piece to rotate, and the female piece drives the male piece to rotate at the same speed, and the male piece can also axially slide and make swing angle movement in the shell 1 of the female piece, thereby driving the output shaft to rotate at the same speed.

[0023] The dust cover main body 2 includes a corrugated cylinder 21 arranged in a conical shape, one end of the corrugated cylinder 21 is provided with a first open end 22, the other end is provided with a second open end 23, the opening of the first open end 22 is smaller than the opening of the second open end 23. The second open end 23 is connected with the open end of the shell 1 in a matched manner, and the first open end 22 is connected with the output shaft (not shown in the drawing) of the universal joint in a matched manner. One end of the output shaft is connected with the three-pronged shaft 7, and the output shaft is provided with one end of the three-pronged shaft 7 inserted into the open end of the shell 1, as Figure 5 Indicated, the three ends of the three-pronged shaft 7 are provided with rollers 8, and the three ends of the three-pronged shaft 7 are cambered ends 71.

[0024] As Figure 4As shown, the inner wall of the second open end 23 of the dust cover body 2 is fixedly provided with three spaced-apart protrusions 4, which divide the second open end 23 into three spaced-apart recesses 5. The recesses 5 correspond to the three rollers 8 on the trident shaft 7 one by one, and each roller 8 slides in the corresponding recess 5.

[0025] A limiting block 3 is fixedly arranged in each recess 5, and the limiting block 3 is fixedly connected with the inner wall of the dust cover body 2 through a reinforcing rib 31. The limiting block 3 is provided with a limiting inclined surface near the end of the shell 1, and the limiting block 3 is in abutting and buffering limiting cooperation with the arc surface end 71 of the trident shaft 7 of the universal joint male part through the limiting inclined surface. Meanwhile, the inner wall of the dust cover body 2 is provided with a circumferential shoulder 32, which is used for abutting and limiting cooperation with the roller 8 of the universal joint male part.

[0026] Through the arrangement of the circumferential shoulder 32, the roller 8 can be directly limited, and the roller 8 is prevented from being separated from the shell 1. Meanwhile, under the arrangement of the limiting block 3, the resistance that the roller 8 receives during the sliding process towards the outside of the shell 1 becomes larger and larger, and the effect of the arc surface end 71 of the trident shaft 7 and the limiting block 3 becomes tighter and tighter, thereby playing a buffering role, releasing the locking force or friction force in advance, avoiding the roller 8 from directly colliding with the circumferential shoulder 32 with a large impact force, and thereby ensuring the service life of the dust cover body 2.

[0027] Working principle: the input shaft 11 can drive the output shaft to rotate at the same speed through the cooperation of the shell 1 and the trident shaft 7. During the rotation of the output shaft, the roller 8 will axially roll and swing in the shell 1.

[0028] When the trident shaft 7 moves to the limit position of the open end of the shell 1, the dust cover body 2 is in a stretched state, and the roller 8 gradually enters the second open end 23. The limiting inclined surface of the limiting block 3 will abut against the arc surface end 71 of the trident shaft 7, thereby buffering and decelerating the universal joint male part, and thereby avoiding the universal joint male part from directly colliding with the circumferential shoulder 32 with a large impact force, and thereby ensuring the service life of the dust cover body 2.

[0029] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A universal joint dust cover, comprising a dust cover body (2), wherein one end of the dust cover body (2) has a first opening end (22) and the other end has a second opening end (23), wherein the first opening end (22) is smaller than the second opening end (23); characterized in that, A limiting block (3) is fixedly installed inside the second opening end (23). The limiting block (3) abuts and limits the universal joint component. The limiting block (3) is fixedly connected to the dust cover body (2) through the reinforcing rib (31). The end of the limiting block (3) near the shell (1) is provided with a limiting slope. The limiting block (3) abuts and buffers the three-pronged shaft (7) of the universal joint component through the limiting slope. The dust cover body (2) is provided with a shoulder (32). The shoulder (32) abuts and limits the roller (8) of the component.

2. The universal joint dust cover according to claim 1, characterized in that, The three ends of the trident shaft (7) are provided with arc-shaped ends (71), which slide in cooperation with the limiting inclined surface of the limiting block (3). The three ends of the trident shaft (7) are connected to a roller (8).

3. The universal joint dust cover according to claim 2, characterized in that, The inner wall of the second opening end (23) of the dust cover body (2) is fixedly provided with three spaced protrusions (4), which divide the second opening end (23) into three spaced recesses (5); the number of limiting blocks (3) and the recesses (5) are equal and correspond one-to-one, and each limiting block (3) is located in the corresponding recess (5); the recesses (5) correspond one-to-one with the three rollers (8) on the three-pronged shaft (7), and each roller (8) is limited and slidably engaged with the corresponding recess (5).

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